package net.minecraft.command;

import java.util.List;
import net.minecraft.enchantment.Enchantment;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagList;
import net.minecraft.server.MinecraftServer;
import net.minecraft.util.BlockPos;

public class CommandEnchant extends CommandBase {
	/**
	 * Gets the name of the command
	 */
	public String getCommandName() {
		return "enchant";
	}

	/**
	 * Return the required permission level for this command.
	 */
	public int getRequiredPermissionLevel() {
		return 2;
	}

	/**
	 * Gets the usage string for the command.
	 */
	public String getCommandUsage(ICommandSender sender) {
		return "commands.enchant.usage";
	}

	/**
	 * Callback when the command is invoked
	 */
	public void processCommand(ICommandSender sender, String[] args) throws CommandException {
		if (args.length < 2) {
			throw new WrongUsageException("commands.enchant.usage", new Object[0]);
		} else {
			EntityPlayer entityplayer = getPlayer(sender, args[0]);
			sender.setCommandStat(CommandResultStats.Type.AFFECTED_ITEMS, 0);
			int i;

			try {
				i = parseInt(args[1], 0);
			} catch (NumberInvalidException numberinvalidexception) {
				Enchantment enchantment = Enchantment.getEnchantmentByLocation(args[1]);

				if (enchantment == null) {
					throw numberinvalidexception;
				}

				i = enchantment.effectId;
			}

			int j = 1;
			ItemStack itemstack = entityplayer.getCurrentEquippedItem();

			if (itemstack == null) {
				throw new CommandException("commands.enchant.noItem", new Object[0]);
			} else {
				Enchantment enchantment1 = Enchantment.getEnchantmentById(i);

				if (enchantment1 == null) {
					throw new NumberInvalidException("commands.enchant.notFound", new Object[] { Integer.valueOf(i) });
				} else if (!enchantment1.canApply(itemstack)) {
					throw new CommandException("commands.enchant.cantEnchant", new Object[0]);
				} else {
					if (args.length >= 3) {
						j = parseInt(args[2], enchantment1.getMinLevel(), enchantment1.getMaxLevel());
					}

					if (itemstack.hasTagCompound()) {
						NBTTagList nbttaglist = itemstack.getEnchantmentTagList();

						if (nbttaglist != null) {
							for (int k = 0; k < nbttaglist.tagCount(); ++k) {
								int l = nbttaglist.getCompoundTagAt(k).getShort("id");

								if (Enchantment.getEnchantmentById(l) != null) {
									Enchantment enchantment2 = Enchantment.getEnchantmentById(l);

									if (!enchantment2.canApplyTogether(enchantment1)) {
										throw new CommandException("commands.enchant.cantCombine",
												new Object[] { enchantment1.getTranslatedName(j),
														enchantment2.getTranslatedName(
																nbttaglist.getCompoundTagAt(k).getShort("lvl")) });
									}
								}
							}
						}
					}

					itemstack.addEnchantment(enchantment1, j);
					notifyOperators(sender, this, "commands.enchant.success", new Object[0]);
					sender.setCommandStat(CommandResultStats.Type.AFFECTED_ITEMS, 1);
				}
			}
		}
	}

	public List<String> addTabCompletionOptions(ICommandSender sender, String[] args, BlockPos pos) {
		return args.length == 1 ? getListOfStringsMatchingLastWord(args, this.getListOfPlayers())
				: (args.length == 2 ? getListOfStringsMatchingLastWord(args, Enchantment.func_181077_c()) : null);
	}

	protected String[] getListOfPlayers() {
		return MinecraftServer.getServer().getAllUsernames();
	}

	/**
	 * Return whether the specified command parameter index is a username parameter.
	 */
	public boolean isUsernameIndex(String[] args, int index) {
		return index == 0;
	}
}
